Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 138
mature gra: reaches thi point where it trips the circuit breaker. If at the current drop back to normal, the armature imme-diately resets itself by means of a ball valve in the top of the brass cylinder CURRENT AND PRESSURE LIMITING DEVICES 1,657 pressure on the bellows, and therefore inversely…
Electrical engineering
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